Decorative window stencil



FIG. 1 is a perspective view of a decorative window stencil showing my new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a top edge view thereof; and,

FIG. 5 is a bottom edge view thereof. 

The ornamental design for a decorative window stencil, as shown. 